diff --git a/tests/functional/centos/7/cluster/group_vars/all b/tests/functional/centos/7/cluster/group_vars/all
index 5b0de7211..37c6df130 100644
--- a/tests/functional/centos/7/cluster/group_vars/all
+++ b/tests/functional/centos/7/cluster/group_vars/all
@@ -20,7 +20,7 @@ openstack_glance_pool:
   type: 1
   erasure_profile: ""
   expected_num_objects: ""
-  size: ""
+  size: 1
 openstack_cinder_pool:
   name: "volumes"
   pg_num: "{{ hostvars[groups[mon_group_name][0]]['osd_pool_default_pg_num'] }}"
@@ -29,7 +29,7 @@ openstack_cinder_pool:
   type: 1
   erasure_profile: ""
   expected_num_objects: ""
-  size: ""
+  size: 1
 openstack_pools:
   - "{{ openstack_glance_pool }}"
   - "{{ openstack_cinder_pool }}"
diff --git a/tests/functional/centos/7/cluster/group_vars/clients b/tests/functional/centos/7/cluster/group_vars/clients
index 55180053b..34e79cd76 100644
--- a/tests/functional/centos/7/cluster/group_vars/clients
+++ b/tests/functional/centos/7/cluster/group_vars/clients
@@ -9,7 +9,7 @@ test:
   type: 1
   erasure_profile: ""
   expected_num_objects: ""
-  size: ""
+  size: "{{ osd_pool_default_size }}"
 test2:
   name: "test2"
   pg_num: "{{ hostvars[groups[mon_group_name][0]]['osd_pool_default_pg_num'] }}"
@@ -18,7 +18,7 @@ test2:
   type: 1
   erasure_profile: ""
   expected_num_objects: ""
-  size: ""
+  size: "{{ osd_pool_default_size }}"
 pools:
   - "{{ test }}"
   - "{{ test2 }}"
diff --git a/tests/functional/centos/7/docker/group_vars/all b/tests/functional/centos/7/docker/group_vars/all
index 9becef192..ea1eaaa2e 100644
--- a/tests/functional/centos/7/docker/group_vars/all
+++ b/tests/functional/centos/7/docker/group_vars/all
@@ -24,7 +24,7 @@ openstack_glance_pool:
   type: 1
   erasure_profile: ""
   expected_num_objects: ""
-  size: ""
+  size: 1
 openstack_cinder_pool:
   name: "volumes"
   pg_num: "{{ hostvars[groups[mon_group_name][0]]['osd_pool_default_pg_num'] }}"
@@ -33,7 +33,7 @@ openstack_cinder_pool:
   type: 1
   erasure_profile: ""
   expected_num_objects: ""
-  size: ""
+  size: 1
 openstack_pools:
   - "{{ openstack_glance_pool }}"
   - "{{ openstack_cinder_pool }}"